<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>TestAPI</title>
</head>

<body>
  <input type="text" id="message">
  <button id="submit">提交</button>

  <script>
    // 创建 websocket 实例
    let websocket = new WebSocket("ws://127.0.0.1:8080/test")
    // 需要给实例挂载一些回调函数
    websocket.onopen = function () {
      console.log("连接建立")
    }

    websocket.onmessage = function (e) {
      console.log("收到消息: " + e.data)
    }

    websocket.onerror = function () {
      console.log("连接异常")
    }

    websocket.onclose = function () {
      console.log("连接关闭")
    }

    // 实现点击按钮后, 通过 websocket 发送请求
    let input = document.querySelector('#message')
    let button = document.querySelector('#submit')
    button.onclick = function () {
      console.log("发送消息: " + input.value)
      websocket.send(input.value)
    }
  </script>
</body>

</html>